Change-Id: I8b73d583be1ee7183f4074bce49d5390e38631a2

We want to have the width both to be at least the contents size
but also stretch to width of the viewport.

Reviewed-By: con

Fix API after doc template change.

Reviewed-by: hjk

The special event filter probably shouldn't eat the enter key if we are
in the editing state.

Requested by con.

Utils::NavigationTreeView is created - as a base class for any Navigation Widget (Side Bar) tree view

Merge-request: 2167
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

Some categories do not have icons yet, unfortunately.

 * Make sure all non-empty source files found below ./src have
   a copyright header.

Reviewed-by: con

Reviewed-by: Daniel Molkentin
Reviewed-by: Friedemann Kleint

Also move Designer::Internal::FormWindowEditor ->
Designer::FormWindowEditor.

Reduce inconsistencies in tr()-Strings provided for
QActions that act on a current <something> (mostly files) by
introducing a ParameterAction class that takes the tr()-Strings
at construction time and provides a setParameter(QString) slot,
allows for setting that parameter or an empty string, which
will cause the displayed text to be updated.